Fixing TierConfig.get

[JaviCerveraIngram]

The configuration.product.id and configuration.account.id filters do not work as expected. Reverting to configuration__product__id and configuration__account__id.

[codecov-io]

Codecov Report

Merging #54 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff           @@
##           master     #54   +/-   ##
======================================
  Coverage    91.6%   91.6%           
======================================
  Files          31      31           
  Lines        1405    1405           
======================================
  Hits         1287    1287           
  Misses        118     118

Impacted Files	Coverage Δ
connect/resources/fulfillment_automation.py	40.29% <ø> (ø)	⬆️
connect/models/tier_config.py	89.7% <100%> (ø)	⬆️

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[codecov-io]

Codecov Report

Merging #54 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff           @@
##           master     #54   +/-   ##
======================================
  Coverage    91.6%   91.6%           
======================================
  Files          31      31           
  Lines        1405    1405           
======================================
  Hits         1287    1287           
  Misses        118     118

Impacted Files	Coverage Δ
connect/resources/fulfillment_automation.py	40.29% <ø> (ø)	⬆️
connect/models/tier_config.py	89.7% <100%> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a9031ba...30a6ff6. Read the comment docs.

[marcserrat]

only requests api works with ., tier is with _
please keep this things with PHP sdk ;)

[JaviCerveraIngram]

Ok, I changed it back in the day due to this discussion on another PR.